Question

Find the value of 2cos 45° cos60°+2 sin 30° tan 60°- cos 60°

Answer 1

Answer:

Step-by-step explanation:

cos45°=1/√2

cos60°=1/2

sin30°=1/2

tan60°=√3

Now, 2cos45.cos60+sin30.tan60-cos60

=2(1/√2)(1/2) + (1/2)(√3)-1/2

=√2/2 +√3/2 -1/2

=(√2+√3-1)/2