IT – sin 8. 2 Simplify cos - 8.

Q: Find sin 5pai/6.

A:

Q: Verify the identity: cos2 x - sin2 x = 2 cos2 x - 1

A:

Q: sin 6r Use the half-angle formulas to simplify the expression, 1+cos 6x sin23x + tan3x tan12x 1-…

A: Using half angle formula's.

Q: Write the expression cos(10x) - cos(12x) as a product of sines and/or cosines. NOTE: Enter the…

A: To write the expression cos10x-cos12x as a product of sines and/or cosines.

Q: why is the inverse cos of -30/12 not possible? I understand how we get the other x values but this…

A: We know cosx≤1 for all real x.

Q: Simplify (cos(11t))+(cos(5t)/sin(11t)-sin(5t))

A:

Q: How do you find sin 58.75  0 on your calculator?

A: Here, the objective is to find the value of sin58.75° using calculator.

Q: Simplify sin2 θ + tan2 θ + cos2 θ. Using fundamental identities.

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Q: Use the fact that sin (38) 0.6157 to complete the expression. 22 cos() 0.6157

A: We have to use the fact  sin(38°) ≈ 0.6157 to complete the expression  cos(.... °) ≈ 0.6157

Q: Use basic identities to simplify cos3x+sin2xcosx.   can you explain this equation and the answer

A:

Q: Show sin 3A = 3 sin A cos²A - sin A.

A: Explanation: Given that: sin3A=3sinAcos2A-sinA Concept: sin3A=3sinA-4sin3A sin2A+cos2A=1

Q: Use a sketch to find the exact value of the expression cos (sin-1 4/5)

A: given expression: cossin-145we have to find the exact value of the expression