Cos2 20 + cos2 70 / cos2 50 + cos2 40 + 2 cosec2 58 2 cot 58 tan 32 -4tan 13 tan 37 tan 45 tan 53 tan 77 Share with your friends Share 11 Manbar Singh answered this cos220° + cos270°cos250° + cos240° + 2 cosec258° - 2 cot 58° tan 32° - 4 tan13° tan37° tan45° tan53° tan77°=cos220° + cos2 90° - 20°cos250°+cos290°-50°+2cosec258°-2cot58°tan90°-58°-4tan13°tan37°×1×tan90°-37°tan90°-13°=cos220° + sin220°cos250°+sin250°+2cosec258°-2cot58°cot58°-4tan13°tan37°×1×cot37°×cot13°= 11+2cosec258°-2cot258°-4tan13°tan37°×1tan37°×1tan13°=11+2cosec258°-cot258°-4=11+21-4 = 13-4 = 1-1 = -1 -15 View Full Answer
