\cos ^ { 2 } 0 ^ ^\circ + \sin ^ { 2 } 60 ^ ^\circ + \tan ^ { 2 } 45 ^ ^\circ + \sec ^ { 2 } 60 ^ ^\circ =

TS ICET 2017 Question Paper with Solutions for online practice

Question : 118 of 200

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\cos ^ { 2 } 0 ^ ° + \sin ^ { 2 } 60 ^ ° + \tan ^ { 2 } 45 ^ ° + \sec ^ { 2 } 60 ^ °

Solution:

\cos^{2}0°+\sin^{2}60°+\tan^{2}45°+\sec^{2}60°

=(1)^{2}+(\;\;{√{3}}/{2})^{2}+(1)^{2}+(2)^{2}

=1+\;\;{3}/{4}+1+4=6+\;\;{3}/{4}=\;\;{27}/{4}

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