Question

(cosec2 45° + 2sin30°) (tan45° + sec45°)
4sin2 60
cos20°​

Answer 1

Step-by-step explanation:

cose45=√2

sin30=1/2

tan45=1

sec45=√2

(cosec2 45+sin30)(tan45+sec45)

=((√2)^2+2×1/2)(1+√2)

=(2+1)(1+√2)

=3+3√2

sin60=√3/2

4sin260=4×3/4=3

cos20=1 since cos0=1