If  sin(x) = −  40 41  and x is in quadrant III, find the exact values of the expressions without solving for x. (a) sin(x/2) (b) cos(x/2) (c) tan(x/2)

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Q: 7/3 L 3 sin(x) – tan²(x): – csc°(x) da. 3. Calculate You might want to use the trig identity 1+ tan2…

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Q: If cos x = 0.62 and P(x/2) is in QII, then cos(x/2) is equal to?

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Q: find f'(x). Answer: f(x) - 5 sin x 1 + cos x

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Q: Find sin(a), given that cos(a) = 2/5 and sin(a) < 0.

A: As we know that, the trigonometric identity: sin2θ+cos2θ=1 Given: cosa=25

Fundamentals of Trigonometric Identities

Trigonometric Identities are the equalities that involve trigonometry functions and hold for all the values of variables given in the equation.