1) Calculate the standard error of the estimate of Y on

What is the value of cos75°? 

If tan θ + cot θ = 2 where 0 < θ < 90 ; find the value of tan³⁰ θ + cot ²⁹ θ.

Find the maximum value of 14 sin A + 24 cos A.

Simplify: sin (A + B) sin (A - B)

If cos2B = sin(1.5B + 41^o), then find the measure of 'B'.

sin² 9 ° + sin² 10 ° + sin² 11 ° + sin² 12 ° + ……… + sin² 81 ° = ?

Find the maximum value of (20sin A + 15cos A).

In a right triangle ABC, angle B = 90°. If tan A = 3/4 and the length of the hypotenuse is 25 cm, find the area of the triangle.

If (sinθ+cosθ)/(sinθ-cosθ) = 2, then the value of sin⁴ θ is

If cos2B = sin(1.5B + 27 ^o), then find the measure of 'B'.