cos (15°) 2 Use the Pythagorean identity to compute sin(15°). = compute all of the other trig functions at 15°.

Q: Use reference angles to find the exact value of the expression cos 23π/4. Do not use a calculator.

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Q: Calculate cos(-628°)

A: Use the trigonometric identity, cos-x=cosx                ...(1)cos2×3600-x=cosx…

Q: cos -30° tan 90⁰

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Q: A table fan has a mark on the tip of one blade. The equation = 23 cos(4x) + 38 represents the height…

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Q: Find exact and approximate values for sin 45°.

A: Isosceles right triangle An isosceles right triangle with sides 1. Now find the hypotenuse side…

Q: Calculate the seventh Sine value and the seventh Sine

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A: Given that x/3  radians is equivalent to 60°.

Q: Use the law of cosines to find cos/POQ. You MUST use the law of cosines;

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Q: Find the exact value in radians. sec (-2) 3. 27t 57

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Q: Calculate tan(360°+α).

A: Given  tan360∘+α we have to find the value of tan360∘+α Now  we know that tanθ=sinθcosθ ⇒tan360∘+α…

Q: 77. From the figure, show that sin(45° – a) = sin95°. A 40° 12 8 45° D C B

A: The given figure is, In triangle ACD,∠DAC=40°∠ACD=45°Using the angle sum property of a…

Q: 11) If is a positive GM between Sec and cosecotan o then value of 0 is: a) 60° c) 30" 12) In how…

A: since you have posted a question with multiple sub-parts, I solve first five subparts for you.

Q: Cos75

A: Given cos(75)

Q: Evaluate sin (195°)

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Q: 5. Simplify the expression cos² (18°) - sin² (18°) to a single trig function of an angle

A: The given expression is

Q: Find the exact value of the expression sin 495°. Do not use a calculator.

A: Consider sin495∘