If 8 tan x = 15, then sin x – cos x is equal to

tan x = 2/5, cos x = 5/2 then sin x ?

tan x = 7/10, sin x = 2/5 then sec x = ?

 $\tan^2x\ -\ \sec^2x\ =\ ?$  

 $\left(1\ +\ \cot^2x\right)\cos^2x\ =\ ?$  

 $\left(1\ +\ \tan^2x\right)\sin^2x\ =\ ?$  

 $\left(1\ +\ \tan^2x\right)\cos^2x\ =\ ?$  

If cos x = 5/4 then sin x ?

If sin x = 7/25, find the values of cos x and tan x.

 $Evaluate:2\sin^230\tan60–3\cos^260\sec^230.$  

Given A= 60 and B = 30, Find Sin A Cos B + Cos A Sin B = ?

Find , if sin (x + 36) = cos x, where x+ 36 is an acute angle.